LG P970 Optimus Black cyanogenmod 7 Build 27

Hey everyone,
I have an issue that occurs on my Optimus Black P970 with CM7 Build 26 and 27.

My MAC address has switched to 00:00:00:00:00:00
and i dont have any idea how to change it.

I have followed some articals regarding this issue
REQUIREMENTS

1) ROOTED PHONE
2) BUSYBOX INSTALLED
3) Terminal App

OPEN UP TERMINAL AND WRITE

:su
:busybox iplink show eth0

(THIS WILL SHOW YOUR CURRENT MAC ADDRESS)

NOW TYPE IN

:busybox ifconfig eth0 hw ether 00:11:22:33:44:55

(INSTEAD OF 00:11:22:33:44:55, YOU CAN WRITE YOUR WANTED ADDRESS)

from this url http://xdaforums.com/showthread.php?t=1385577

and i have verified that the file nvram.txt on system/etc/wifi/nvram.txt
contain the new MAC address i have input.

but still My wifi MAC address is 00:00:00:00:00:00 and its impossible to connect to a wifi.


Some1 know the Code for Engineering mode (Hidden menu) for P970 CM7?
Any suggestions?

Thanks in advance

Hey , thank you for your replay.

As i found some instruction to write a MAC address properly , it requires to activate CP USB and this option only can be activated through Hidden menu

P.s , also my IMEI address has been resetted and this is 3rd time i am installing Build 26 and 27 on the phone (Clean install

I have fixed it ... i have returned to build: CyanogenMod-7-11162011-Nightly-OptimusBlack